Fbiedmch soyez



Aug. 28, 1928.

F SOYEZ CENTRIFUGAL SORTING APPARATUS Filed Aug. 5, 1927 /n venia/v Patented Aug. 28, 1928.

FRIEDRICH SO'EZ, OF MANNHEIM, GER

HOF, `DIE' MAN N HEIM-WALDHOF,

F F I C E t MANY, ASSIG-NOR TO ZELISTO'FFABRIK WALD- GERMANY, A JOINT-STOCK COMPANY.

CENTRIFUGAI SORTING .APPARATUS.

Application filed August 3, 1927, Serial No. 210, 106, and in Germany August 11, 1926.

It is known to use for the screening of cellulose and the like, apparatus with vertical strainer cylinders which have the advantage oveflthe screening horizontal cylnders,

apparatus with that they are more easy to see and are more accessible, more particularly during the working.

The vertical screening apparatus hitherto known, has however the drawback that the tailings and knots cylinder during the ing process, against the The knots whole t are thereby pa remain in the screening ime of the sortand are constantly projected wall of the strainer Vcylinder.

rtly splintered;i" the splinters pass with the pulp through the straining wall and render the product impure.

strainer wall is easily liable These drawbacks Moreover, owing to the constant im-- the hard tailings and knots, the

tobe damaged.

are eliminated by the new apparatus, as the knots are substantially removed from the passes into the pulp before it screening cylinder proper.

This is attained by arranging in front of the rotating strainer cylinder, in the drection of the ?movement of the pulp, a centrifugal device by means of which the specifically heavier tailings and the' like, are substantially separated already before the admission into the strainer.

Even those knots etc. which 'are accidentally carried by the mass into the strainer cylinder, the cylinder being in vertical position, sink again to the bottom in within the range device arranged n front.

a more or less owng to ther specfic gravty short time and thus get of action of the centrifugal The strainer cylinders and the centrifugal device arranged in front, mounted on one are preferably and the same spindle or combined together to form a single unit.

The tailings and knots separated by the centrifugal device arranged in front, leave the apparatus, or smaller quantities of separate outlet opening, conveyed first into an ordin mostly mixed with greater- (pulp, through a and are preferably ary tailings collector in which the admixed pulp 'is separated from the tailings etc. and thus also retained in a pure state.

A Construction of the device according to the invention is illustrated ample in the accompanying Figure 1 shows the mach tion whilst Fignres 2 and by way of exdrawing.

ine in cross sec- 3 show the adopening for justable outlet openings leading to the branch collector pipe, with the greatest and smallest opening, in horizontal section.

The cellulose to be sorted is admitted from a storagetank under a pressure which should be as constant as possible, through the inlet pipe a into the screen, narnely firstly within the range of action of the ro. tating bottom part c which is arranged in front of the Sorting cylinder proper, mountedon the same spindle I as the latter, formed 'into a bucket wheel (similar to that of a centrifugal pump) and provided with several raclal ribs e.

Owing to the inlet pipe projecting with its lower, opening close to the bottom part a of the sorting cylinder (i the specifically heavier branches fioating in the pulp, are carried by the centrifugal forces produced by the rotation, into the tailings collector pipe and conveyed with a portion of the pulp through the rsing pipe g into a tailings collector of well known Construction. The latter separates the tailings, whilst the good pulp can be again supplied to the inlet pipe a or directly to further treatment.

In order not-to discharge through f and g more pulp than is required for conveying the tailings, the bottom part h of the sorter is provided with an annular rib z' which is provided on the circumference with several openings acting as outlets. Round the rib i is arranged a horizontally rotatable annular valve k also provided with slots (compare also Figures 2 and By means of a simple device, the said ring 0 can be mo ed from the outside, and the outlet openings for the tailings can be adjusted more or less great, accordlng to the quality of the pulp and to the degree of impurity. Figure 2 shows the position of the ring for 'the greatest, and Figure 3 for the smallest outlet the tailings; Z is the closed outer jacket or casing of the screen, m 'the pulp'outlet and n the detachable cover made in two sections.

What I claim and desire to secure by Letters Patent of the United States is 1. In combination with a Vertical centrifugal screen, a centrifugal device by means of which knots and the like having greater specific gravity than pulp are substantially separated from the pulp before admitting the pulp into the screen.

2. In combination with a vertical centrifugal screen, a centrifu gal device which is arranged beneath said screen and by means V of which the knots and the like having greater specific gravity than pulp are substantially separated from the pulp before ad:- mitting the pnlp into the screen. V

3. In& combination with a. vertical centrifugal screen, a centrifugal device ,which is arranged beneath said screen on a common vertical spindle and by means of which the knots and' the like having greater specic gravity than pulp` are substantially separated from the pulp before adnitting'the pulp into the screen.

4. In combination with a vertical centrifugal screen, a centrifugal device beneath said screen on a common vertical spindle and fitted to said screen to form a single apparatus, and by means of which the knots and the like having greater specific gravity than pulp are substantially separated from the pulp before admitting the pulp into the screen.

5. In combination with a vertical centrifugal screen, a centrifugal device beneath 'said screen' on a vertical spindle and fitted to said screen to form a single apparatus, the pulp supply being arranged in such a manner that the pulp is first exposed to the action of the centrifugal device before admitting the pulp into the screen.

6. In combination with a vertical centrifugal screen, a rotatable vessel, the bottom of said vessel being shaped like a bucket-wheel and being provided with several -radal ribs and with outlet openings in the circumference.

7. In combination with a vertical centrifugal screen, a rotatablevessel, the bottom of 'said vessel being shaped like a bucket; wheel and being provided with several radial ribs and without outlet openings in the circuniference, said rotatable vessel being arranged beneath said screen 8. In combinaton with a vertical centrif-` ugal screen, a' rotatable vessel, the bottom of said vessel being shaped like a bucket-wheel and being provided with several radial ribs and without outlet openings .in the circum- 'erence, said rotatable vessel being arranged beneath said screen on .a common vertical spindle.

9. In combination with a vertical centrifugal screen, a rotatable vessel, the bottom of said vessel being shaped like a bucketwheel and being provided with several radial ribs and with outlet openings in the circumference, said rotatable vessel being arranged beneath said screen on a common vertical spindle and fitted to said screen to form a single apparatus. 10. In combination with a vertical centrifugal screen, a rotatable vessel, the bottom oi' said vessel being shaped like a bucketwheel, and being provided with radial ribs, and an adjustable outlet opening i'n the circumference.

11. In ombination with a vertical centrifugal screen, a rotatable vessel, the bottom of said vessel belngshaped like a bucket-wheel and being provided with radial ribs, the circumference of the wheel having outlet openings adjustable by means of an annular valve, said rotatable vessel being arranged beneath said screen on a common vertical spindle and fitted onto said screen to form' a single apparatus.

FRIEDRICH SOYEZ 

